# Modeling of Optical Fields in Light-Emitting Devices Using a Modal Method

**Prof. Niels Gregersen**

Technical University of Denmark

Mon., May 26, 2014

10:30 AM @ Stirling 201

## Abstract:

The engineering of a nanophotonic light-emitting device requires an in-depth understanding of the governing physical mechanisms of the system obtained using full 3D vectorial optical simulations. In the modal method, the geometry is sliced into layers uniform along a propagation z axis, and the field is then expanded on the eigenmodes of uniform layers and on the Bloch modes of periodic sections. Using mode matching at the interfaces, the method gives direct access to reflection and transmission coefficients describing the scattering of the optical modes. In this presentation, I will introduce the modal method and discuss applications of the method to the engineering of the adiabatic micropillar laser and the photonic nanowire single-photon source, where the intermodal scattering coefficients provided by the modal method are directly used in the design to ensure high device performance.